The Indian Health Service (IHS) within the Department of Health and Human Services (HHS) is the lead federal agency charged with improving the health of American Indians and Alaska Natives. IHS provides health care for approximately 2.2 million eligible American Indians/Alaska Natives through a system of programs and facilities located on or near Indian reservations, and through contractors in certain urban areas.It provides services either directly or through facilities and programs operated by Indian Tribes or Tribal Organizations through self-determination contracts and self-governance compacts authorized in the Indian Self-Determination and Education Assistance Act (ISDEAA).